The formal label should indicate the grade of silk quilt, superior product, first-class product or qualified product, and the qualified product has the lowest grade; Only in terms of raw materials, the cost difference between qualified products and superior products is several times or even ten times.

On the washing trademark of silk quilt, the column of composition content will divide silk into three or six grades. According to the national standard of silk quilts, the lengths of different grades of silk quilts are different.